This is a story that I have carried with me for six years, and it is an obsession that I cannot let go of. The characters here have had countless setting changes, and the story has had countless choices, overturns and restarts. It has become a part of my life. It originally had a very vulgar name called Friendship Without Borders, which I came up with when I was in junior high school. Between the third year of high school and the college entrance examination, I suddenly wanted to call it Utopia, because it contains my original fantasy, my most far-fetched dream, the ending of the plot theme I want, and the characters I like. Then let's begin, my utopia.